80 lines
2.3 KiB
Diff
80 lines
2.3 KiB
Diff
From 1910584831fe065c50efc3c07b8ea08ff90e6f31 Mon Sep 17 00:00:00 2001
|
|
From: Stefan Wahren <stefan.wahren@i2se.com>
|
|
Date: Sat, 13 Oct 2018 13:31:21 +0200
|
|
Subject: [PATCH] firmware: raspberrypi: Add backward compatible
|
|
get_throttled
|
|
|
|
Avoid a hard userspace ABI change by adding a compatible get_throttled
|
|
sysfs entry. Its value is now feed by the GET_THROTTLED requests of the
|
|
new hwmon driver. The first access to get_throttled will generate
|
|
a warning.
|
|
|
|
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
|
|
---
|
|
drivers/firmware/raspberrypi.c | 33 +++++++++++++++++++++++++++++++++
|
|
1 file changed, 33 insertions(+)
|
|
|
|
--- a/drivers/firmware/raspberrypi.c
|
|
+++ b/drivers/firmware/raspberrypi.c
|
|
@@ -28,6 +28,7 @@ struct rpi_firmware {
|
|
struct mbox_chan *chan; /* The property channel. */
|
|
struct completion c;
|
|
u32 enabled;
|
|
+ u32 get_throttled;
|
|
};
|
|
|
|
static struct platform_device *g_pdev;
|
|
@@ -174,6 +175,12 @@ int rpi_firmware_property(struct rpi_fir
|
|
|
|
kfree(data);
|
|
|
|
+ if ((tag == RPI_FIRMWARE_GET_THROTTLED) &&
|
|
+ memcmp(&fw->get_throttled, tag_data, sizeof(fw->get_throttled))) {
|
|
+ memcpy(&fw->get_throttled, tag_data, sizeof(fw->get_throttled));
|
|
+ sysfs_notify(&fw->cl.dev->kobj, NULL, "get_throttled");
|
|
+ }
|
|
+
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rpi_firmware_property);
|
|
@@ -198,6 +205,27 @@ static int rpi_firmware_notify_reboot(st
|
|
return 0;
|
|
}
|
|
|
|
+static ssize_t get_throttled_show(struct device *dev,
|
|
+ struct device_attribute *attr, char *buf)
|
|
+{
|
|
+ struct rpi_firmware *fw = dev_get_drvdata(dev);
|
|
+
|
|
+ WARN_ONCE(1, "deprecated, use hwmon sysfs instead\n");
|
|
+
|
|
+ return sprintf(buf, "%x\n", fw->get_throttled);
|
|
+}
|
|
+
|
|
+static DEVICE_ATTR_RO(get_throttled);
|
|
+
|
|
+static struct attribute *rpi_firmware_dev_attrs[] = {
|
|
+ &dev_attr_get_throttled.attr,
|
|
+ NULL,
|
|
+};
|
|
+
|
|
+static const struct attribute_group rpi_firmware_dev_group = {
|
|
+ .attrs = rpi_firmware_dev_attrs,
|
|
+};
|
|
+
|
|
static void
|
|
rpi_firmware_print_firmware_revision(struct rpi_firmware *fw)
|
|
{
|
|
@@ -227,6 +255,11 @@ rpi_register_hwmon_driver(struct device
|
|
|
|
rpi_hwmon = platform_device_register_data(dev, "raspberrypi-hwmon",
|
|
-1, NULL, 0);
|
|
+
|
|
+ if (!IS_ERR_OR_NULL(rpi_hwmon)) {
|
|
+ if (devm_device_add_group(dev, &rpi_firmware_dev_group))
|
|
+ dev_err(dev, "Failed to create get_trottled attr\n");
|
|
+ }
|
|
}
|
|
|
|
static void rpi_register_clk_driver(struct device *dev)
|